Final answer:
A lightning talk is the presentation format with the most brief time frame, usually five to ten minutes, focussed on delivering concise content quickly.
Step-by-step explanation:
Among the choices given, a lightning talk is the presentation format most likely to have a very brief time frame with an audience. A lightning talk typically lasts for a few minutes, ranging between five to ten minutes, and sometimes even less. These talks are designed to be concise presentations on specific topics, where the speaker must communicate their ideas in a clear, quick, and efficient manner.
On the other hand, options such as a workshop, seminar, or panel discussion usually have longer durations, ranging from an hour to several hours or even a full day, allowing for a more in-depth exploration of the topic with interactive components or multi-speaker discussions. In comparison, for someone preparing a ten minute talk using PowerPoint or another presentation software, it is essential to be succinct and focused on the key messages to fit within the concise framework of a lightning talk.